Improvement in throttle-valves



UNITED STATES PATENT OEEICE.

vETHAN A. GATES, OF BURLINGAME, KANSAS, ASSIGNOR OF ONE-HALF HIS RIGHTTO SANFORD R. LEONARD.

IMPROVEMENT IN THROTTLE-VALVES.

Specification forming part of Letters Patent No. 154,661. datedSeptember 1, 187i application filed January 24, 1874.l v

To all 'whom it may concern:

Be it known that I, ETEAN A. GATES, of Burlingame, in the county ofOsage and State of Kansas, have invented a new and useful Improvement inThrottle-Valves, of which the following is a specication:

The invention will first be fully described, and then pointed out in theclaims.

In vthe accompanying drawing, Figure 1 represents a Verticallongitudinal section of the entire device on the line .r x of Fig. 2.Fig. 2 is an elevation, showing the throttlevalve as when in use. Fig. 3is a cross-section of Fig. 1, taken on the line y y.

Similar letters of reference indicate corresponding parts.

A is the valve-shell. B represents the valve. G is the valve-rod. I) isa packin g-rin g around the valve. This packing is an elastic ring outlongitudinally, and confined between the shoulder E of the valve andbelow the nut F at the top, and is made to snugly nt the valve-cylinlsides of the valve marked K in the drawing.

L is the valveseat. When the valve is on its seat these ports areclosed, and when the valve is raised the steam passes through 'the portsK into the chamber J, and is discharged into the steam-pipe attached tothe shell at the point M. N is the top ofthe Valvechalnber, which isscrewed into the top of the shell. O is a stuffing-box therein. l is thelever, by means of which the valve is operated. Q is an oil-tube, whichpasses down through the shell, and delivers oil to lubricate the valve.This valve is balanced by the pressure of steam upon its sides, so thatit works up and down without Vundue friction, and always workssteam-tight. The positions of the ports K vare indicated in thecross-section.

Having thus described my invention,I olai 1n as new and desire to secureby Letters Patent- 1. A piston throttle-valve, having a chambered shell,J, and ports K, and provided with an oil-tube, Q, for lubricating thevalve, substantially as shown and described.

2. The interior rod H and Wedge G, in combination with the expansiblepacking-ring D, as shown and described, and for the purposes set forth.

ETHAN A. GATES.

NVitnesses:

F. W. HUNT, M. F. SMITH.

